"I like the uniqueness of the track," Bowyer said. "I've struggled to have good finishes there, but we've always raced well. We just can't seem to seal the deal at the end. Something always goes haywire in the end but, sooner or later, we are going to overcome that and have a good weekend. Doing that this weekend would be perfect."

Darlington will celebrate its third annual "Throwback Weekend" from Friday through Sunday. The festivities -- paying homage to the 1985-89 era -- include drivers sporting retro paint schemes, NASCAR Hall of Famers Bill Elliott and Richard Petty piloting the honorary pace car, Bret Michaels performing a pre-race concert and a litany of other activities linking the present to the past.

Darlington has treated Sadler well throughout his career. In 13 starts at the South Carolina track, Sadler claims one win, five top fives, six top 10s and a 14.6 average finish. In his last four races at Darlington, he has one win and two runner-ups.

Sadler enters Saturday's race coming off a 14th-place showing at Road America. He hasn't won a race this season, but owns nine top-five and 17 top-10 finishes in 23 starts. The 42-year-old Virginian has a 9.0 average finish.

"This weekend's race at Darlington is a big one for me," Sadler said. "Not only am I returning as the race winner, but I am also running a throwback paint scheme driven by one of my all-time favorite drivers, Cale Yarborough. To win back-to-back throwback races, and to do it in the same scheme Cale won back-to-back Daytona 500s in, would be incredible for me."

Nemechek readies for repeat in Canada

--In one of the most dramatic finishes in the NASCAR Camping World Series last year, John Hunter Nemechek bumped Cole Custer in the final turn at Canadian Tire Motorsport Park and the two barreled each other off the asphalt as they crossed the finish line. Replay showed that Nemechek barely beat Custer to the stripe for the victory.

Nemechek will try to defend his win in Sunday's Chevrolet Silverado 250 at the 10-turn road course (2:30 p.m. ET on FS1) -- the only track on the schedule where drivers go left and right.

In addition to his win, the No. 8 Chevrolet driver has showings of ninth (2015) and 25th (2014) at CTMP.

On the season, Nemechek boasts two wins, seven top fives and 11 playoff points in 14 starts. He has two more races to add playoff points before the NASCAR Camping World Truck Series postseason begins at New Hampshire Motor Speedway on Sept. 23.

"Going to a track we've won at before definitely gives us a boost of confidence," Nemechek said. "I feel like going to Canadian Tire is definitely going to be a momentum builder as we inch closer to the playoffs."

What To Watch For: NASCAR pays homage to its 1985-89 era as it celebrates the third annual throwback weekend at Darlington Raceway. ... Two races remain until the Monster Energy NASCAR Cup Series playoffs. Three postseason berths remain up for grabs. ... Martin Truex Jr. attempts to defend his 2016 Darlington victory. ... Sunoco Rookie of the Year frontrunner Erik Jones tries to win his way into the playoffs after posting a career-best runner-up finish at Bristol.

What To Watch For: Three races remain until the NASCAR Xfinity Series playoffs. ... William Byron attempts to add to his series-leading three wins and 17 playoff points. ... Jeremy Clements tries to build on the momentum gained from his first career win at Road America last week. ... Monster Energy NASCAR Cup Series drivers Austin Dillon, Ty Dillon, Denny Hamlin, Reed Sorensen, Erik Jones, Joey Logano and Kevin Harvick will compete in the Xfinity race at Darlington.

What To Watch For: Three playoff berths are still up for grabs with two races remaining in the NASCAR Camping World Truck Series regular season. Winless drivers Chase Briscoe, Ben Rhodes and Ryan Truex currently hold the final three spots, but Grant Enfinger is only nine points behind Truex for the final playoff berth. ... Four different drivers have won in the four races at Canadian Tire Motorsport Park. ... NASCAR Next driver Todd Gilliland is set to make his third career NCWTS start.